diff --git a/core/lib/Drupal/Core/Entity/EntityBCDecorator.php b/core/lib/Drupal/Core/Entity/EntityBCDecorator.php
index e4d6a65..a6e0937 100644
--- a/core/lib/Drupal/Core/Entity/EntityBCDecorator.php
+++ b/core/lib/Drupal/Core/Entity/EntityBCDecorator.php
@@ -219,7 +219,9 @@ public function __isset($name) {
    */
   public function __unset($name) {
     $value = &$this->__get($name);
-    $value = array();
+    // Unset should act like the property isn't set and thus ignored. Following
+    // structure will provide that behaviour with EntityBCDecorator::__isset().
+    $value = array(LANGUAGE_NOT_SPECIFIED => NULL);
   }
 
   /**
diff --git a/core/modules/field/field.api.php b/core/modules/field/field.api.php
index 29112ef..d815469 100644
--- a/core/modules/field/field.api.php
+++ b/core/modules/field/field.api.php
@@ -1086,7 +1086,7 @@ function hook_field_attach_view_alter(&$output, $context) {
     $element = &$output[$field_name];
     if ($element['#field_type'] == 'entity_reference' && $element['#formatter'] == 'entity_reference_label') {
       foreach ($element['#items'] as $delta => $item) {
-        $term = $item['taxonomy_term'];
+        $term = $item['entity'];
         if (!empty($term->rdf_mapping['rdftype'])) {
           $element[$delta]['#options']['attributes']['typeof'] = $term->rdf_mapping['rdftype'];
         }
diff --git a/core/modules/field/field.module b/core/modules/field/field.module
index 36bd18a..fa9f24e 100644
--- a/core/modules/field/field.module
+++ b/core/modules/field/field.module
@@ -944,7 +944,10 @@ function field_view_field(EntityInterface $entity, $field_name, $display_options
 
   if ($formatter) {
     $display_langcode = field_language($entity, $field_name, $langcode);
-    $items = $entity->{$field_name}[$display_langcode];
+    $items = array();
+    if (isset($entity->{$field_name}[$display_langcode])) {
+      $items = $entity->{$field_name}[$display_langcode];
+    }
 
     // Invoke prepare_view steps if needed.
     if (empty($entity->_field_view_prepared)) {
@@ -956,7 +959,10 @@ function field_view_field(EntityInterface $entity, $field_name, $display_options
       _field_invoke_multiple('prepare_view', $entity->entityType(), array($id => $entity), $null, $null, $options);
 
       // Then let the formatter do its own specific massaging.
-      $items_multi = array($id => $entity->{$field_name}[$display_langcode]);
+      $items_multi = array($id => array());
+      if (isset($entity->{$field_name}[$display_langcode])) {
+        $items_multi[$id] = $entity->{$field_name}[$display_langcode];
+      }
       $formatter->prepareView(array($id => $entity), $display_langcode, $items_multi);
       $items = $items_multi[$id];
     }
diff --git a/core/modules/node/lib/Drupal/node/NodeStorageController.php b/core/modules/node/lib/Drupal/node/NodeStorageController.php
index 69374a0..c9e832e 100644
--- a/core/modules/node/lib/Drupal/node/NodeStorageController.php
+++ b/core/modules/node/lib/Drupal/node/NodeStorageController.php
@@ -165,7 +165,7 @@ protected function preSaveRevision(\stdClass $record, EntityInterface $entity) {
 
     if ($entity->isNewRevision()) {
       $record->timestamp = REQUEST_TIME;
-      $record->uid = isset($record->revision_uid) ? $record->revision_uid : $GLOBALS['user']->uid;
+      $record->uid = isset($entity->revision_uid->value) ? $entity->revision_uid->value : $GLOBALS['user']->uid;
     }
   }
 
diff --git a/core/modules/rdf/rdf.module b/core/modules/rdf/rdf.module
index 89494eb..547075a 100644
--- a/core/modules/rdf/rdf.module
+++ b/core/modules/rdf/rdf.module
@@ -787,9 +787,9 @@ function rdf_field_attach_view_alter(&$output, $context) {
       foreach ($element['#items'] as $delta => $item) {
         // This function is invoked during entity preview when taxonomy term
         // reference items might contain free-tagging terms that do not exist
-        // yet and thus have no $item['taxonomy_term'].
-        if (isset($item['taxonomy_term'])) {
-          $term = $item['taxonomy_term'];
+        // yet and thus have no $item['entity'].
+        if (isset($item['entity'])) {
+          $term = $item['entity'];
           if (!empty($term->rdf_mapping['rdftype'])) {
             $element[$delta]['#options']['attributes']['typeof'] = $term->rdf_mapping['rdftype'];
           }
diff --git a/core/modules/taxonomy/taxonomy.module b/core/modules/taxonomy/taxonomy.module
index 452d5a1..01de5c8 100644
--- a/core/modules/taxonomy/taxonomy.module
+++ b/core/modules/taxonomy/taxonomy.module
@@ -1101,7 +1101,7 @@ function taxonomy_field_formatter_view(EntityInterface $entity, $field, $instanc
   $element = array();
 
   // Terms whose tid is 'autocreate' do not exist
-  // yet and $item['taxonomy_term'] is not set. Theme such terms as
+  // yet and $item['entity'] is not set. Theme such terms as
   // just their name.
 
   switch ($display['type']) {